diff --git a/FFMpegCore.Test/BitmapSources.cs b/FFMpegCore.Test/BitmapSources.cs
index 2a81d57..c3e8d40 100644
--- a/FFMpegCore.Test/BitmapSources.cs
+++ b/FFMpegCore.Test/BitmapSources.cs
@@ -30,12 +30,14 @@ private static BitmapVideoFrameWrapper CreateVideoFrame(int index, PixelFormat f
             for (int y = 0; y < h; y++)
                 for (int x = 0; x < w; x++)
                 {
+                    var xf = x / (float)w;
+                    var yf = y / (float)h;
                     var nx = x * scaleNoise + offset;
                     var ny = y * scaleNoise + offset;
 
                     var value = (int)((Perlin.Noise(nx, ny) + 1.0f) / 2.0f * 255);
 
-                    var color = Color.FromArgb(value, value, value);
+                    var color = Color.FromArgb((int)(value * xf), (int)(value * yf), value);
 
                     bitmap.SetPixel(x, y, color);
                 }
diff --git a/FFMpegCore/Extend/BitmapVideoFrameWrapper.cs b/FFMpegCore/Extend/BitmapVideoFrameWrapper.cs
index 5a96357..e2f0737 100644
--- a/FFMpegCore/Extend/BitmapVideoFrameWrapper.cs
+++ b/FFMpegCore/Extend/BitmapVideoFrameWrapper.cs
@@ -70,9 +70,9 @@ private static string ConvertStreamFormat(PixelFormat fmt)
                 case PixelFormat.Format16bppRgb565:
                     return "bgr565le";
                 case PixelFormat.Format24bppRgb:
-                    return "rgb24";
+                    return "bgr24";
                 case PixelFormat.Format32bppArgb:
-                    return "rgba";
+                    return "bgra";
                 case PixelFormat.Format32bppPArgb:
                     //This is not really same as argb32
                     return "argb";